I've learned one thing for sure since trying to learn flint knapping: flint can lay you open as quick as a razor blade. I've had several occasions when I not even feel getting cut and just notice blood running out of my fingers/hand. Some of those bigger flakes come off scary sharp and would do quick work of gutting a deer. Some of them are sharper than most people's steel blade knives they carry today. And if the piece they used got dull, all they had to do was knock some more flakes off and bam...good as new. All you really have to do is set your platforms up to drive big flakes. There were indeed artists back then that knew their craft very well but the average person could knock some uniface flakes off and be fully functional for skinning and gutting animals.